001    /*
002     * Copyright (C) 2010 eXo Platform SAS.
003     *
004     * This is free software; you can redistribute it and/or modify it
005     * under the terms of the GNU Lesser General Public License as
006     * published by the Free Software Foundation; either version 2.1 of
007     * the License, or (at your option) any later version.
008     *
009     * This software is distributed in the hope that it will be useful,
010     * but WITHOUT ANY WARRANTY; without even the implied warranty of
011     * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
012     * Lesser General Public License for more details.
013     *
014     * You should have received a copy of the GNU Lesser General Public
015     * License along with this software; if not, write to the Free
016     * Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
017     * 02110-1301 USA, or see the FSF site: http://www.fsf.org.
018     */
019    
020    package org.crsh.term.console;
021    
022    import org.crsh.text.Style;
023    
024    import java.io.IOException;
025    
026    /**
027     * The console writer controls the output as seen by the client of the console.
028     * It never changes the console internal state.
029     *
030     * @author <a href="mailto:julien.viet@exoplatform.com">Julien Viet</a>
031     * @version $Revision$
032     */
033    public abstract class ConsoleWriter {
034    
035      /**
036       * Write a char sequence to the output.
037       *
038       * @param s the char sequence
039       * @throws IOException any io exception
040       */
041      public abstract void write(CharSequence s) throws IOException;
042    
043      /**
044       * Write a single char to the output.
045       *
046       * @param c the char to write
047       * @throws IOException any io exception
048       */
049      public abstract void write(char c) throws IOException;
050    
051      /**
052       * Write some style to the output.
053       *
054       * @param style the data to write
055       * @throws IOException any io exception
056       */
057      public abstract void write(Style style) throws IOException;
058    
059    }